Man indeed is the most noble, by creation, of all the creatures in the visible World; but by sin he has made himself the most ignoble. - John Bunyan

Christian meets two more ill-fated pilgrims as he continues his expedition down the King's Highway. His ability to discern a false pilgrim has been advanced since his experience with Simple, Sloth, and Presumption.
Christian immediately focuses on three things that seem out of place. First, the tumbling over the wall called Salvation without coming through Christ, the narrow gate, or experiencing any illumination by the Holy Spirit immediately warns Christian that these are trespassers. Second, their testimony of having come from the land of Vain-Glory warns Christian that they are neither humble nor burdened by sin. Third, their wish to arrive at Mt. Zion to receive praise rather than to give praise to the only one worthy of praise alarms Christian. Christian quickly discerns that the motives of Formalist and Hypocrisy are unworthy and contemptuous.
Formalist

Now I saw in my dream, that the highway, up which Christian was to go, was fenced on either side with a wall, and that wall was called salvation. Up this way, therefore, did burdened Christian run, but not without great difficulty, because of the load on his back. He ran thus till he came at a place somewhat ascending; and upon that place stood a cross, and a little below, in the bottom, a sepulchre. So I saw in my dream, that just as Christian came up with the cross, his burden loosed from off his shoulders, and fell from off his back, and began to tumble, and so continued to do till it came to the mouth of the sepulchre, where it fell in, and I saw it no more.

Wake up, see your own wretchedness, and fly to the Lord Jesus. He is the righteousness of God, for He Himself is God. Only by believing in His righteousness will you be delivered from condemnation.